Bisexuals are men and women who achieve sexual or erotic attraction to members of both sexes. Usually, but not always, the bisexual person engages in sexual activity with partners of both sexes. Slang terms referring to bisexuals are "AC/DC" (based on the term used to describe two types of electrical current), "switch-hitters" (a baseball term describing a batter who hits from either side of home plate depending on who's pitching), or people who "swing both ways" (another baseball phrase, but may also relate to swinging as sexual behavior).

Little to No Study on Bisexual Behavior

Compared to heterosexuality and homosexuality, very little scientific study has been conducted on bisexuality. Based on the studies that have been done, it appears that bisexuals are not people whose orientation is fundamentally homosexual but who have some heterosexual sex on the side. Nor are they people whose orientation is fundamentally heterosexual but who enjoy homosexual sex on the side.

Also, fundamentally, they are not people who, at one point in their lives, engage in sexual behavior with persons of one sex and then, at another point, engage in sexual behavior with persons of the other sex, although this pattern of sequential changes is sometimes called transitional bisexuality. Rather, bisexuals are people who are sexually attracted to persons of both sexes during the same general time period in their lives.

It is thought that people develop and experience bisexuality in a number of different ways. For some it begins as a form of experimentation that adds a spark to their sex lives, but it does not become the main arena of sexual activity. For others it is a deliberate choice to participate in whatever feels best at the moment.

As sexology has moved from surveys and self-reporting to laboratory settings, male bisexuality has been caught in the scientific crosshairs. Why do some question its legitimacy as a bona fide sexual identity?

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